/**
 * Example test file demonstrating how to use the fixtures
 * This is a template for creating actual unit tests
 */

import { describe, it, expect } from '@jest/globals';
import * as Fixtures from './fixtures/fixtures';
import { LineLengthFormatter } from '../line-length-formatter';
import { FormatterConfig } from '../../../src/types';
import type { LineLengthConfig } from '../types';

describe('Formatting Examples with Fixtures', () => {
  // Setup formatter with default config
  const formatterConfig: FormatterConfig = {
    tabSize: 2,
    useTabs: false,
    quoteStyle: 'single',
    semicolons: true,
    trailingCommas: false,
    maxLineLength: 80
  };

  const lineLengthConfig: LineLengthConfig = {
    maxLineLength: 80,
    ignoreComments: false,
    ignoreStrings: false,
    ignoreUrls: false,
    ignoreTemplateLiterals: false
  };

  const formatter = new LineLengthFormatter(formatterConfig, lineLengthConfig);

  describe('Basic Constructs', () => {
    it('should format function calls correctly', () => {
      const { original, expected } = Fixtures.FunctionCall;
      const result = formatter.format(original);
      
      // This is an example - actual assertion would compare formatted output
      expect(result).toBeDefined();
      // expect(result).toBe(expected);
    });

    it('should format object literals correctly', () => {
      const { original, expected } = Fixtures.ObjectLiteral;
      const result = formatter.format(original);
      
      expect(result).toBeDefined();
      // expect(result).toBe(expected);
    });

    it('should format array literals correctly', () => {
      const { original, expected } = Fixtures.ArrayLiteral;
      const result = formatter.format(original);
      
      expect(result).toBeDefined();
      // expect(result).toBe(expected);
    });
  });

  describe('TypeScript Specific', () => {
    it('should format union types correctly', () => {
      const { original, expected } = Fixtures.UnionType;
      const result = formatter.format(original);
      
      expect(result).toBeDefined();
      // expect(result).toBe(expected);
    });

    it('should format type assertions correctly', () => {
      const { original, expected } = Fixtures.TypeAssertion;
      const result = formatter.format(original);
      
      expect(result).toBeDefined();
      // expect(result).toBe(expected);
    });

    it('should format imports correctly', () => {
      const { namedOriginal, namedExpected } = Fixtures.Import;
      const result = formatter.format(namedOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(namedExpected);
    });
  });

  describe('Critical Cases (ASI & Semantic Preservation)', () => {
    it('should NOT break line immediately after return (ASI)', () => {
      const { objectOriginal, objectExpected } = Fixtures.ReturnStatement;
      const result = formatter.format(objectOriginal);
      
      // Critical: must not have "return\n{" pattern (ASI error)
      expect(result).not.toMatch(/return\s*\n\s*\{/);
      // expect(result).toBe(objectExpected);
    });

    it('should NOT break line immediately after throw (ASI)', () => {
      const { errorOriginal, errorExpected } = Fixtures.ThrowStatement;
      const result = formatter.format(errorOriginal);
      
      // Critical: must not have "throw\n" pattern (ASI error)
      expect(result).not.toMatch(/throw\s*\n/);
      // expect(result).toBe(errorExpected);
    });

    it('should NOT format template literals (semantic preservation)', () => {
      const { simpleOriginal, simpleExpected } = Fixtures.TemplateLiteral;
      const result = formatter.format(simpleOriginal);
      
      // Critical: template literals must remain unchanged
      // Any whitespace change breaks semantic equivalence
      expect(result).toBe(simpleExpected);
    });
  });

  describe('Expressions', () => {
    it('should format logical expressions correctly', () => {
      const { andOriginal, andExpected } = Fixtures.LogicalExpression;
      const result = formatter.format(andOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(andExpected);
    });

    it('should format for loops correctly', () => {
      const { classicOriginal, classicExpected } = Fixtures.ForLoop;
      const result = formatter.format(classicOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(classicExpected);
    });
  });

  describe('Comments', () => {
    it('should format single-line comments correctly', () => {
      const { singleLineOriginal, singleLineExpected } = Fixtures.Comment;
      const result = formatter.format(singleLineOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(singleLineExpected);
    });

    it('should format block comments correctly', () => {
      const { blockOriginal, blockExpected } = Fixtures.Comment;
      const result = formatter.format(blockOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(blockExpected);
    });
  });

  describe('Semantic Equivalence', () => {
    it('should preserve semantic equivalence for all fixtures', () => {
      // Test all fixture categories
      const allFixtures = [
        Fixtures.FunctionCall,
        Fixtures.ObjectLiteral,
        Fixtures.ArrayLiteral,
        Fixtures.Assignment,
        Fixtures.UnionType,
        Fixtures.Import,
        Fixtures.LogicalExpression,
        Fixtures.ClassDeclaration,
        Fixtures.ReturnStatement,
        Fixtures.ThrowStatement,
        Fixtures.ForLoop,
        Fixtures.TypeAssertion
      ];

      allFixtures.forEach((fixture) => {
        if ('original' in fixture) {
          const result = formatter.format(fixture.original);
          
          // Each formatted result should:
          // 1. Be valid syntax (no parse errors)
          // 2. Be semantically equivalent to original
          // 3. Meet line length requirements
          
          expect(result).toBeDefined();
          expect(result.length).toBeGreaterThan(0);
        }
      });
    });
  });

  describe('Nested and Complex Cases', () => {
    it('should handle nested function calls', () => {
      const { nestedOriginal, nestedExpected } = Fixtures.FunctionCall;
      const result = formatter.format(nestedOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(nestedExpected);
    });

    it('should handle nested objects', () => {
      const { nestedOriginal, nestedExpected } = Fixtures.ObjectLiteral;
      const result = formatter.format(nestedOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(nestedExpected);
    });

    it('should handle method chaining', () => {
      const { chainingOriginal, chainingExpected } = Fixtures.FunctionCall;
      const result = formatter.format(chainingOriginal);
      
      expect(result).toBeDefined();
      // expect(result).toBe(chainingExpected);
    });
  });
});

/**
 * Usage example for accessing fixtures by category
 */
describe('Fixture Organization', () => {
  it('should have all fixture categories', () => {
    expect(Fixtures.fixtures.basic).toBeDefined();
    expect(Fixtures.fixtures.typescript).toBeDefined();
    expect(Fixtures.fixtures.expressions).toBeDefined();
    expect(Fixtures.fixtures.critical).toBeDefined();
    expect(Fixtures.fixtures.documentation).toBeDefined();
    expect(Fixtures.fixtures.ui).toBeDefined();
  });

  it('should define category constants', () => {
    expect(Fixtures.categories.BASIC).toBe('basic');
    expect(Fixtures.categories.TYPESCRIPT).toBe('typescript');
    expect(Fixtures.categories.EXPRESSIONS).toBe('expressions');
    expect(Fixtures.categories.CRITICAL).toBe('critical');
    expect(Fixtures.categories.DOCUMENTATION).toBe('documentation');
    expect(Fixtures.categories.UI).toBe('ui');
  });
});

